Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Translation Adjustment [Member]	Accumulated Defined Benefit Plans Adjustment [Member]
Balance at Dec. 31, 2010	$ 1,390,215	$ 27,709	$ 193,277	$ (61,385)	$ 1,239,574	$ (5,263)	$ (3,697)
Balance, shares at Dec. 31, 2010		110,834
Stockholders' Equity [Roll Forward]
Net Income	235,658
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(18,374)
Other Comprehensive Income	(18,231)					(18,374)	143
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(143)
Restricted stock unit activity	15,199		9,532	5,667
Restricted stock activity	0		(1,509)	1,509
Tax benefits from stock plans	1,319		1,319	0
Cash dividends	(48,707)				(48,707)
Treasury stock purchases	(17,491)			(17,491)
Balance at Dec. 31, 2011	1,557,962	27,709	202,619	(71,700)	1,426,525	(23,637)	(3,554)
Balance, shares at Dec. 31, 2011		110,834
Stockholders' Equity [Roll Forward]
Net Income	289,017				289,017
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	44,775
Other Comprehensive Income	45,037					44,775	262
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(262)
Restricted stock unit activity	14,842		8,985	5,857
Restricted stock activity	0		(1,139)	1,139
Tax benefits from stock plans	2,475		2,475
Cash dividends	(74,515)				(74,515)
Treasury stock purchases	(19,358)			(19,358)
Balance at Dec. 31, 2012	1,815,460	27,709	212,940	(84,062)	1,641,027	21,138	(3,292)
Balance, shares at Dec. 31, 2012		110,834
Stockholders' Equity [Roll Forward]
Net Income	371,500
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(71,282)					(71,282)
Other Comprehensive Income	(70,423)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(859)						859
Restricted stock unit activity	13,509		6,447	7,062
Restricted stock activity	0		(1,264)	1,264
Tax benefits from stock plans	4,279		4,279
Cash dividends	(90,885)				(90,885)
Balance at Dec. 31, 2013	$ 2,043,440	$ 27,709	$ 222,402	$ (75,736)	$ 1,921,642	$ (50,144)	$ (2,433)
Balance, shares at Dec. 31, 2013		110,834